Wrought-iron coupling for pipe-sections



- (No Model.)

J. O. MORSE.

WROUGHT IRON COUPLING FOR PIPE SECTIONS.

M Patented Sept. 5, 1882.

UNrTED ST TES PATENT screwjointsbetween sections of wrought-iron a length will be substantially the same, and conthroughout the entire length of the ring, and

i the male screws.

that the male screws on the ends of the pipesections and the female screws within the taper, so that when these parts are screwed 'out a parallel screw-thread extending the en-.

JAMES o. MORSE, or ENGLnwooD,.NEw JERSEY.

I WROUGHT-IRO N COUPLING FOR PIPE-SECTIONS.

SPEQIFICATION forming part of Letters Patent No.:263,94=3, dated September 5, 1882.

Application filed Fcbruary2 1,1882. (No model.) r

Toall whom it may concern 1 Beitknown thatI, JAMES 0. MORE, of Englewood, in the county of Bergen and State of New Jersey, have invented certain new and useful Improvements in Wrought-Iron Couplings for Pipe-Sections, of which the following is a specification.

It is important in forming tight and stiff pipe united by wrought-iron coupling-rings coupling-tin g be of a true and corresponding home the diameter of the male and female screws at anycorrcsponding point of their sequently the threads of the screws will be in intimate contact with each other throughout their entire length, and will contribute to the tightness, strength, and stiffness of thejoint.

.Heretot'ore it has been the ordinary practice to construct wrought-iron coupling-rings with female screws whose threads upon the opposite sides of the wall of the coupling were parallel, thus producing a bore 'of uniform diameter as the male screws upon the endsof the pipesectious must be tapering the result was a failure to produce the tight, stiff, and strong joint required for many purposes. Attempts have been made to increase the efficiency of such joints by applying great force in screwing the end of the pipe into the coupling, whereby the female screw has become expanded and slightly tapered, and thus made to correspond, ina measure, to the shape of the male screw; but this stretching of the ring not only can never produce a perfect fit of the parts, but also tends to weaken thecouplingl The recent application of wrought-iron pipe to long lines under great pressure, and to deep oil-wells requiring perfect tightness and great stiffness under vibration, has led to the construction of wrought-iron couplings with female screws at each end of the coupling of a taper tocorrespond accurately to the-true taper of g This coupling as heretofore constructednhas been made by first tapping tire length or the coupling and then tapping thejunction of the tapering with the parallel thread by the cross-cut of the tap.

It is the object of the present invention to produce wrought-iron coupling-rings provided with screw-threads having a true taper from each end of the ring toward the center thereof.

The invention isillustra-ted in the accompanying drawings, in which Figure 1 is a sec tional viewof a plain ring,or blank of wrought- .iron with a central groove or recess extending around its interior wall. Fig. 2 is a plain ring or blank with interior-tapered ends, and with the central groove or recess formed by expanding the metal; and Fig. 3 is a sectional view of a completed coupling-ring with tapered screw,-threads extending from each of its ends to the edges of. the central groove or recess.

In the drawings, A represents a ring or blank of wrought-iron with a/central groove or recess, B, extending around the interior.

0 represents a blank or ring whose-'ends'e c are brought to the desired taper for the screwthreads by reaming out the metal or otherwise.

D represents a completed coupling-ring with tapered screw-threads f f extending from its ends to the edges of the groove or recess B.

The ring A maybe formed up from a strip or bar of wrought'iron of the required width and thickness in the ordinary way by welding its ends together and bringing it into'cylindrical form. The groove or recess B is then reamed or cut out by properly-constructed tools to a depth substantially equal to or a little exceeding that of the final tapered threads of the coupling, and of a width sufficient to permit the cutting of the tapered threads upon either side of the groove without interfering with the metal upon the other side thereof. The tapered threads ff are then out upon the two ends of the ring A by the use of tapered screw-taps, the groove 13 permitting the tap to work into the coupling sufficiently far to cut the thread to the required depth from the end of the coupling to the wall of the groove.

Instead of forming the groove or recess B 5 by cutting or reaming out the metal of the ring, it may be formed by expanding the metal outward by the application of well-known tools or machines for this purpose, thus forming a projection or boss, 9, on the external wall of 10' the ring,- as shown in Figs. 2 and 3; or the groove or recess B maybe roiled or otherwise formed in the strip or bar of iron before it is shaped up into the ring, and its depth and outline/retained by welding the ring upon a 15 properly-constructed anvil. I

In making coupling-rings of large diameter,

it facilicates the work to ream out the i nterior walls adjacent to the ends of the ring to substantially their final taper or incline before cutting or tapping out the threads. This step of 20 the operation is shown in Fig. 2, the taper bein 5: represented by e c.

What is claimed as new is A wrought-iron coupling-ring composed of a central interior groove or recess and tapered 2 5' screw-threads extending from the ends of the ring to the edges of the groove, substantially as and for the purpose described.

JAMES O. MORSE. Witnesses:

S. SAMUEL P. BELL, ROBT. H. DUNCAN. 

